Air Pollution Control System

The roots of pollutants

Mechanical Process

Tumbling

Grinding

Conveying

Crushing

Thermal Process

Heating

Drying

Melting

Burning

Chemical Process

Laminating

Painting

Surface Coating

Galvanizing

Electroplating

Types of Air Pollutants

Sulphur Dioxide

Carbon Monoxide

Nitrogen Oxide

Volatile Organic Compounds

Particulate Matters

Carbon Dioxide

Air Pollution Control System System

Equipment

Settling Chamber

Cyclone Dust Collector

Bag Filter Dust Collector

Scrubber

Electrostatic Precipitators

After Burner/Thermal Oxidizer/Flares

Vehicle Spray Painting Booth

Function

Hood-To collect

receives or contain the emitted contaminants

Ducts

To transport air and entrained contaminants within the system

Air Cleaner

To remove contaminants from the air stream

Exhaust Fan

To create airflow in the system and supply required static pressure

Stack

To discharge/dispersed the clean air to the environment

Benefits

Ensure continued performance of air pollution control system

Early indication of impending problem

Lessens possibility of sudden system failure

Avoids unnecessary plant shutdown and costly enforcement

Record keeping requirements help in management review & operating trends

Designing of APCS

Function of APCS

Identify Problem

Develop Plan

Control Source

Verify Source Emission

Verify source compliance

Monitor the air or receive complaint

Principles of APCS

Enclose source as completely as practicable

Capture contaminant with adequate velocity

Transport air & entrained contaminant with adequate velocity

Efficiency of filtering system

Important Design Parameters

Face Velocity (Vf)

Capture Velocity (Vc)

Transport/Duct Velocity (Vd)

Volumetric Flow rate (Q)

Static Pressure (Sp)

Velocity Pressure (Vp)

Total Pressure (Tp)

Stages Prequisites

Adequate Design

Quality Construction

Proper Operation, Preventive Maintenance, Performance Monitoring

Consideration Factors

Environmental Factors

Engineering Factors

Dust Collector

Particle & Air Stream Characteristic

Air to cloth velocity

Collection Efficiency

Pressure Drop

Filter Media

Fan

Fan Pressure

Fan Performance Curve

Economic Factors

Performance Monitoring

Function

Broken/leakage of duct

Corroded cyclones

Bag filters are not working in good condition

Scrubber liquid low/high in pH

Instruments

Smoke Tube

Manometer

Traverse pilot tube connected to manmeter

Surface thermometer

Test hammer

Tachometer

Anometer

Performance to Check

Bag Filter

Pressure Drop

Flowrate

Opacity

Temperature

Dust

Compressed pressure

Scrubber

Temperature

Pressure Drop

Liquid flowrate